#pragma once

#include <iostream>
#include <string>
#include <cstdarg>
#include <ctime>
#include <unistd.h>
#include <fstream>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

enum
{
    Debug = 0,
    Info,
    Warning,
    Error,
    Fatal
};
enum
{
    Screen = 10,
    ClassFile,
    OneFile
};

std::string LevelToString(int level)
{
    switch (level)
    {
    case Debug:
        return "Debug";
    case Info:
        return "Info";
    case Warning:
        return "Warning";
    case Error:
        return "Error";
    case Fatal:
        return "Fatal";
    default:
        return "Unknown";
    }
}

const int defaultstyle = Screen;
const std::string default_filename = "log.";
const std::string logdir = "log";
class Log
{
public:
    Log() : style(defaultstyle), filename(default_filename)
    {
        mkdir(logdir.c_str(), 0775);
    }
    void Enable(int sty)
    {
        style = sty;
    }
    std::string TimeStampExlocaltime()
    { // 时间戳转化成字符串
        time_t currtime = time(nullptr);
        struct tm *curr = localtime(&currtime);
        char time_buffer[128];
        snprintf(time_buffer, sizeof(time_buffer), "%d-%d-%d %d:%d:%d",
                 curr->tm_year + 1900, curr->tm_mon + 1, curr->tm_mday,
                 curr->tm_hour, curr->tm_min, curr->tm_sec);
        return time_buffer;
    }
    void WriteLogOneFile(const std::string logname, const std::string &message)
    {
        umask(0);
        int fd = open(logname.c_str(), O_CREAT | O_WRONLY | O_APPEND);
        if (fd < 0)
            return;
        write(fd, message.c_str(), message.size());
        close(fd);
        // std::ofstream out(logname);
        // if(!out.is_open())
        //     return;
        // out.write(message.c_str(),message.size());
        // out.close();
    }
    void WriteLogClassFile(const std::string leverstr, const std::string &message)
    {
        std::string logname = logdir;
        logname += "/";
        logname += filename;
        logname += leverstr;
        WriteLogOneFile(logname, message);
    }
    void WriteLog(const std::string &leverstr, const std::string &message)
    {
        switch (style)
        {
        case Screen:
            std::cout << message;`
            break;
        case OneFile:
            WriteLogOneFile("all", message);
            break;
        case ClassFile:
            WriteLogClassFile(leverstr, message);
            break;
        default:
            break;
        }
    }
    void LogMessage(int level, const char *format, ...) // 类C的一个日志接口
    {
        // char content[1024];
        // va_list args; // char *, void *
        // va_start(args, format);
        // // args 指向了可变参数部分
        // vsnprintf(content, sizeof(content), format, args);
        // va_end(args); // args = nullptr;
        // // uint64_t currtime = time(nullptr);

        // std::string currtime = TimeStampExlocaltime();
        // printf("[%s][%s]%s\n", LevelToString(level).c_str(),
        //        std::to_string(currtime).c_str(), content);

        char rightbufer[1024];
        va_list args;
        va_start(args, format);
        vsnprintf(rightbufer, sizeof(rightbufer), format, args);
        va_end(args);

        char leftbuffer[1024];
        std::string leverstr = LevelToString(level);
        std::string currtime = TimeStampExlocaltime();
        std::string id_str = std::to_string(getpid());

        snprintf(leftbuffer, sizeof(leftbuffer), "[%s][%s][%s]",
                 leverstr.c_str(), currtime.c_str(), id_str.c_str());

        std::string loginfo = leftbuffer;
        loginfo += rightbufer;
        WriteLog(leverstr, loginfo);
    }
    ~Log() {}

private:
    int style;
    std::string filename;
};
Log lg;
class Conf
{
public:
    Conf()
    {
        lg.Enable(Screen);
    }
    ~Conf() {}

private:
};
